You will need to comply with this code to use sealed sources in radiation gauges.
This code lays down the requirements for the design, testing, supply, use, storage, transport, disposal and radiation monitoring of fixed radiation gauges. It applies to industrial radiation gauges that are designed for installation as a fixed component within an industrial process and are used for the direct or indirect control of any part of that process.
Please consult the Contact Officer for more information and to ascertain the level of compliance (if any) that may be required.